Patents by Inventor David B. Docherty

David B. Docherty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5302004
    Abstract: A method for removing asbestos containing material from an area of a building by creating a containment area substantially surrounding the area of the building where the asbestos containing material is located. Removing and compressing compressible asbestos containing material within the containment area and cutting rigid asbestos containing material into pieces within the containment area. Packaging the compressed and cut asbestos containing material for removal from the containment area. Demolishing block walls within the containment area and grinding pieces of the walls into particles for removal from the containment area. Scraping adhering asbestos containing material from surfaces within the containment area and encapsulating the surfaces from which asbestos containing material has been removed with a lock-down agent.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: April 12, 1994
    Assignee: QSI International, Inc.
    Inventor: David B. Docherty